Venous ThrombosisThrombosisPortal VeinVeinsFemoral VeinThrombophlebitisIliac VeinCoronary ThrombosisSinus Thrombosis, IntracranialUpper Extremity Deep Vein ThrombosisPhlebographyIntracranial ThrombosisAnticoagulantsMesenteric VeinsCarotid Artery ThrombosisRenal VeinsPopliteal VeinSubclavian VeinSplenic VeinJugular VeinsSaphenous VeinPulmonary EmbolismVaricose VeinsHeparin, Low-Molecular-WeightThrombophiliaVena Cava, InferiorFibrin Fibrinogen Degradation ProductsCerebral VeinsAxillary VeinHeparinPostthrombotic SyndromeFactor VBudd-Chiari SyndromeVenous ThromboembolismSagittal Sinus ThrombosisUltrasonography, Doppler, DuplexFibrinolytic AgentsProtein S DeficiencyThrombectomyThromboembolismTreatment OutcomeIntracranial Embolism and ThrombosisVena Cava FiltersWarfarinMesenteric Vascular OcclusionPulmonary VeinsRisk FactorsPostphlebitic SyndromeStockings, CompressionPlethysmography, ImpedanceProthrombinHemorrhageActivated Protein C ResistanceBlood CoagulationIntermittent Pneumatic Compression DevicesLegThrombolytic TherapyRetrospective StudiesTime FactorsHemostasisHepatic VeinsAntiphospholipid SyndromeFollow-Up StudiesProspective StudiesTomography, X-Ray ComputedBandagesProtein C DeficiencyCatheterization, Central VenousHypertension, PortalRecurrencePlatelet Aggregation InhibitorsAntithrombin III DeficiencyCavernous Sinus ThrombosisStentsVenous InsufficiencyFibrinogenLower ExtremityUltrasonography, DopplerPortasystemic Shunt, SurgicalUmbilical VeinsEnoxaparinUltrasonography, Doppler, ColorBleeding TimeCatheterization, PeripheralLateral Sinus ThrombosisVascular PatencyAntibodies, AntiphospholipidFibrinFibrinolysisPlatelet AggregationPregnancy Complications, CardiovascularIncidenceAngiographyDrug-Eluting StentsSplenectomyGraft Occlusion, VascularPostoperative ComplicationsThromboplastinProtein CAcute Disease